/*
 * Copyright (C) 2021 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
package com.rengwuxian.materialedittext;

/**
 * get attr value class
 *
 * @author get resource class
 * @since 2021-04-14
 */
public class Colors {
    private Colors() {
    }

    public static boolean isLight(int color) {
        return Math.sqrt(
                red(color) * red(color) * .241
                        + green(color) * green(color) * .691
                        + blue(color) * blue(color) * .068) > 130;
    }

    public static int red(int color) {
        return (color >> 16) & 0xFF;
    }

    public static int green(int color) {
        return (color >> 8) & 0xFF;
    }

    public static int blue(int color) {
        return color & 0xFF;
    }
}
